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notsponge [240]
1 year ago
15

Expand and simplify (2x + 3) (x + 7)

Mathematics
1 answer:
RUDIKE [14]1 year ago
5 0

Answer:

2x^{2} +17x+21

Step-by-step explanation:

multiply the 2x by x and 7 and then multiply 3 by x and 7. you will get 2x^{2}+14x+3x+21. combine like terms so add 14x to 3x and thats the only like trerms in the equation. so 2x^2+17x+21

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Jake bakes and sell apple pies. he sells each pie for $5.75. the materials to make the pies cost $40. the boxes jake puts the pi
dezoksy [38]

Answer:

18\ pies

Step-by-step explanation:

Let

x-------> the number of pies

we know that

5.75x-40-12.50=50 -----> linear equation that represent the situation

solve for x

5.75x-52.50=50

5.75x=50+52.50

5.75x=102.50

x=102.50/5.75=17.8

Round to the nearest whole number

17.8=18\ pies

8 0
3 years ago
Read 2 more answers
WILL MARK BRAINLIEST!!
Rudik [331]

Answer:

C = (A*P - 8.4Y -330T + 200I) / 100

Step-by-step explanation:

P = (8.4Y + 330T + 100C -200I ) / A

now we have to calculate completed passes C for given P, Y, T, I, A

A*P = 8.4Y + 330T -200I +100C

100C = A*P - 8.4Y - 330T + 200I

C = (A*P - 8.4Y -330T + 200I) / 100

I just solved the equation for C

5 0
3 years ago
The mean life of a certain brand of auto batteries is 44 months with a standard deviation of 3 months. Assume that the lives of
alisha [4.7K]

Answer:

99.7%

Step-by-step explanation:

Using the z score formula

z-score is z = (x-μ)/σ

where:

x = raw score

μ = population mean

σ = population standard deviation.

a) for x = raw score = 35

μ = population mean = 44

σ = population standard deviation =3

z = (35 - 44)/3

z = -9/3

z = -3

b) for x = raw score = 53

μ = population mean = 44

σ = population standard deviation =3

z = (53 - 44)/3

z = 9/3

z = 3

We would use the standard normal distribution table to find their probabilities

P(Z<=-3)=0.0013499

P(Z<=+3)=0.99865

So P(-3<=Z<=3)=0.99865 - 0.0013499 = 0.9973

Converting to percentage = 0.9973 × 100 = 99.73%

Therefore, the percentage of auto batteries of this brand that have a life of 35 to 53 months to one decimal place is 99.7%

6 0
3 years ago
Math (not too hard answer asap) :)
Katena32 [7]

Answer:

  • A and C

Step-by-step explanation:

  • A. 134 is the mode, correct, repeated 5 times
  • B. 111 is appears 3 times, incorrect , this number is not part of data set
  • C. There are more data values between 130 and 139, correct, there are 8 of them
  • D. There are 20 data values, incorrect , there are 23
3 0
3 years ago
I need with number 16
Arturiano [62]

Answer:

Ben will carry 63/8 or 7.9 of recycling.

Step-by-step explanation:

14 + 10 1/2 + 16 1/4 = 163/4 - 25 = 63/4 ÷ 2 = 63/8 or 7.9

Hope that helps :)

4 0
3 years ago
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